Problem description.
I have 4 solenoids (24V) switched by optocouplers.
I want to measure the current of the solenoids (100-350mA) by a 10 Ohm shunt.
The shunts have to be in the positive path between optocoupler and solenoid, putting the shunts behind the solenoids and ground is not possible.
The Hardware is a PXI-1033 system with PXI-6251 DAQ-Module.
Problem: measuring the current with 10Ohm differential an AI Ground leads to a Signal above 10V
Connecting AI+ and AI- with 100kOhm Resitors to AI Ground leads to a Signal above 10V
Is there are a hardware solution to solve that Problem?
Thanks for help
